Pace of Aging Explained: Reading Changes in Your Weekly Index
Understand how My Bio Age’s Pace of Aging summarises a trend in weekly Index estimates and why it is not a direct measurement of cellular aging.
By My Bio Age
Pace of Aging describes how your MyBioAge Index™ has changed over time. It is calculated from a sequence of stored weekly estimates. The name describes the app’s trend metric, not a laboratory measurement of the speed at which your cells age.
How the trend is calculated
My Bio Age fits a trend to complete weekly Index results. The Index detail view includes three-month and six-month windows when enough history is available. The Weekly Digest also provides a shorter view. Longer windows and shorter windows can differ because they include different weeks.
You need a series of weekly results to interpret a slope. Sparse data, a new source of readings, a scoring update or an unusually different week can have a noticeable effect.
What the multiplier means
- 1.0× means the fitted Index is increasing at about one estimated age-year per calendar year over that window.
- Below 1.0× means it is increasing more slowly, holding steady or declining, depending on the value.
- A negative value means the fitted Index is declining over that window.
- Above 1.0× means it is increasing more quickly over that window.
These are mathematical descriptions of a model output. A negative value does not demonstrate age reversal, and a value above 1.0× does not diagnose accelerated aging.
An example of interpreting two windows
Imagine your recent Index results improve after several weeks with higher values. The shorter window may show a falling trend while the longer window remains flatter. Both can describe their selected dates correctly. Neither tells you which habit caused the difference.
Use it to frame questions
Review the weekly Index and its contributing metrics alongside the trend. Check whether the same inputs were available across the period. If you changed a routine, keep notes separately and compare them with several complete weeks, without treating the comparison as an experiment that proves cause and effect.
Do not use Pace of Aging to decide whether a supplement, treatment or medication is effective. My Bio Age is a wellness tool. Clinical decisions need appropriate assessment and evidence beyond a wearable-derived score.
Follow your weekly Index over time with the context behind each result. Get My Bio Age free on the App Store. The iPhone app is completely free, with no in-app purchases, subscription or account required. Your health data is processed privately on your iPhone.